// $Id$
// vim:tabstop=2
/***********************************************************************
 Moses - factored phrase-based language decoder
 Copyright (C) 2010 Hieu Hoang

 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 ***********************************************************************/

#pragma once

#include <map>
#include <vector>
#include <string>
#include "moses/TranslationModel/PhraseDictionary.h"
#include "OnDiskPt/OnDiskWrapper.h"
#include "OnDiskPt/Word.h"
#include "OnDiskPt/PhraseNode.h"
#include "util/check.hh"

#ifdef WITH_THREADS
#include <boost/thread/tss.hpp>
#else
#include <boost/scoped_ptr.hpp>
#endif

namespace Moses
{
class TargetPhraseCollection;
class DottedRuleStackOnDisk;
class InputLatticeNode;

/** Implementation of on-disk phrase table for hierarchical/syntax model.
 */
class PhraseDictionaryOnDisk : public PhraseDictionary
{
  typedef PhraseDictionary MyBase;
  friend std::ostream& operator<<(std::ostream&, const PhraseDictionaryOnDisk&);

protected:
#ifdef WITH_THREADS
  boost::thread_specific_ptr<OnDiskPt::OnDiskWrapper> m_implementation;
#else
  boost::scoped_ptr<OnDiskPt::OnDiskWrapper> m_implementation;
#endif

  OnDiskPt::OnDiskWrapper &GetImplementation();
  const OnDiskPt::OnDiskWrapper &GetImplementation() const;

public:
  PhraseDictionaryOnDisk(const std::string &line);
  ~PhraseDictionaryOnDisk();
  void Load();

  PhraseTableImplementation GetPhraseTableImplementation() const {
    return OnDisk;
  }

  // PhraseDictionary impl
  //! find list of translations that can translates src. Only for phrase input
  virtual const TargetPhraseCollection *GetTargetPhraseCollection(const Phrase& src) const;

  virtual ChartRuleLookupManager *CreateRuleLookupManager(
    const InputType &,
    const ChartCellCollectionBase &);

  virtual void InitializeForInput(InputType const& source);
  void SetTargetPhraseFromPtMatrix(const std::vector<InputLatticeNode*> &phraseDictionaryQueue) const;

};

}  // namespace Moses